Naked protoplasm and synchronous nuclei
نویسندگان
چکیده
منابع مشابه
Naked active galactic nuclei
In this paper we report the discovery of a new class of active galactic nucleus in which although the nucleus is viewed directly, no broad emission lines are present. The results are based on a survey for AGN in which a sample of about 800 quasars and emission line galaxies were monitored yearly for 25 years. Among the emission line galaxies was the expected population of Seyfert 2 galaxies wit...
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We present the first X-ray observations of three sources belonging to a new AGN class: the naked AGNs. Based on optical spectroscopic studies, these sources appear as classical type 2 (obscured) AGNs, with only narrow emission lines. However, long-term optical monitoring campaigns, carried out over more than two decades, show that the same sources are strongly variable, like type 1 (un-obscured...
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A 64-year-old woman with myelodysplastic syndrome (MDS) presented with pneumonia. At that time, naked megakaryocyte nuclei ( NMN ) , compact lobulated megakaryocyte nuclei denuded of cytoplasm, appeared in her peripheral blood (Picture). The NMN increased to about 20% of the total white blood cell counts (WBC: 14.1×10/L) and these cells were CD41+/CD61+ by the flow cytometry analysis. Bone marr...
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ژورنال
عنوان ژورنال: Nature
سال: 1982
ISSN: 0028-0836,1476-4687
DOI: 10.1038/298874a0